CIRCULAR POLARIZING PLATE AND DISPLAY DEVICE

Provided are a circular polarizing plate which is a thin and broadband circular and a display device having the circular polarizing plate. The circular polarizing plate has a substrate, a retardation layer, and a polarization layer, and has the birefringence Δn (λ) with respect to light of a wavelen...

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Bibliographic Details
Main Authors HATANAKA NOBUYUKI, YOKOTA AKIRA, KOBAYASHI TADAHIRO
Format Patent
LanguageEnglish
Korean
Published 08.01.2020
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Summary:Provided are a circular polarizing plate which is a thin and broadband circular and a display device having the circular polarizing plate. The circular polarizing plate has a substrate, a retardation layer, and a polarization layer, and has the birefringence Δn (λ) with respect to light of a wavelength of λ nm of the retardation layer satisfying expressions (1) Δ n (450) / Δ n (550) <= 1.00, and (2) 1.00 <= Δ n (650) / Δ n (550). The retardation layer and the polarization layer are a coating layer together, and the sum of the thicknesses of the retardation layer and the polarization layer is 10 μm or less. In addition, the polarizing layer contains a dichroic dye. [과제] 박형이며 또한 광대역의 원편광판 및 이 원편광판을 구비한 표시 장치를 제공하는 것. [해결수단] 기재와 위상차층과 편광층을 지니고, 상기 위상차층의 파장 λnm의 빛에 대한 복굴절율 Δn(λ)이 식(1) 및 식(2)을 만족하고, 위상차층과 편광층이 함께 코팅층이며, 위상차층과 편광층의 두께의 합계가 10 ㎛ 이하이고, 또한, 상기 편광층이 이색성 색소를 함유하는 것을 특징으로 하는 원편광판. Δn(450)/Δn(550)≤1.00 (1) 1.00≤Δn(650)/Δn(550) (2)
Bibliography:Application Number: KR20190167810